Improvement in burglar-alarms



duted @sq-States.

@anni @pitre Letters Patent No. 111,003, dated January 1 7, 1-871.

IMPROVEMENT IN BURGLAR-ALRMS. I

The Schedule referred to irl-these Lettera Patent and making part of thesame.

l', WILLIAM REYNOLDS, of Manchester, in the county ot' Hillsborough andState of New Hampshire, have invented cert-ain Improvements in Burglar-Alarms, of which the following is a spcciiication.v

M y invention relates to alarms to be used in buildings, and is operatedby theV opening` ot` any door Aor window with which it is connected.

rlhe nature of my invention consists in so arranging the operativepart-s that the hammer-arm rests directly upon the movable orsupporting-rod, the displacement of whiehcauses the alarm toibc set inmotion. i

In thc accompanying drawingliigure l is a plan of my alarm;

Figure 2, a side elevation;

Figure 3, a vertical section, showing a part of the operative parts; and

Figure 4. is a perspective vicwJef the detachable rod.

A reprcseuts'a hase or table, to which the various parts ot' thc alarmare attached;

I5 is a standard, to which the frame (in which is placed gearing similarto that used in ordinary alarmclocks) is secured;

C, a. standard,to which is secured a gong, D and E is a'supporting-post,the upper'cnd of which is pointed, or nearly so.

a is a. shalt, on which is a cog-wheel, l), ratchetwheel, c, and a. flatcoil-spring, d.

The outer end of this shaft is square, on which the key lits to wind upthe spring d.

On the shaft c is a pinion and scape-wheel, f, and

overl it is another shaft, y, to the underside ot' which is attached anarm, g', and on each endy of it is -a pallet, which `operate on theteeth ot' thescape-wheel.

Attached to the shalt y] is an arm, h, which exftends over the gong l),:indou its outer cnd is aball l;or hammer, i.

the wires or cords that extend to the doors erwindows.

I a connecting-plate, which may be used' when it is desired to connectseveral wires or cords to' one spi-ino'. In it is a slot, through whichpasses a screw rlhe arm h is then raised, and the detachable rod Fplaced between itand the' sumiorting-post E.

When the arm his raised up in this position it holds one of the palletson the arm y', between `two of the teeth ofthe scape-wheel j, therebyprevent-ing any movement ot the operative parts of the alarm.

llhe spring d can now be wound up and the alarm is set.

Should any door or window which is connected with` the alarm be opened,the detachable rod F is immediately thrown from its position ontop ofthesupporting-post E and from .under thc arm h, thus releasing thcscape-wheeland allows the spring (l to exert its power to' operate thecog-wheel on the shaft a, and it, the scape-wlieelj,t11c teeth of whichstrikingthe pallets on the arm y', give it and the arm ha vibratorymotion, causing the .ball or hammer i to rapidly strike the gong D and'sound analarm.

I do not claim supporting the hammer-arm 'by -means of a separate-arm orlever; but

What I do claim, aud desire to Vsecure by Letters Patent, isf'lliercombination ot' the supporting-post E, detachable rod F, andhammer-arm z., when said hammerarm rests directly npoirtiie rod F, allconstructed and operated substantially as shown and described.

WILLIAM REYNOLDS.

W ituesscs Gnoucn A. Unmut J onu l). POWELL.

